Local and nonlocal entanglement for quasiparticle pairs induced by Andreev reflection

Abstract

We investigate local and nonlocal entanglement of particle pairs induced by direct and crossed Andreev reflections at the interfaces between a superconductor and two normal conductors. It is shown theoretically that both local and nonlocal entanglement can be quantified by concurrence and detected from the violation of a Bell inequality of spin current correlators, which are determined only by normal reflection and Andreev reflection eigenvalues. There exists a one-to-one correspondence between the concurrence and the maximal Bell-CHSH parameter in the tunneling limit.

References in corpus (2)

• Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
• Production and detection of entangled electron-hole pairs in a degenerate electron gas

Cited by in corpus (2)

• Current and noise correlations in a double dot Cooper pair beam splitter
• Elementary Charge Transfer Processes in a Superconductor-Ferromagnet Entangler